John Edward McCosker is an American ichthyologist and as has been part of expeditions to many countries such as Antarctic, Australia, and the Galapagos. After extensive study and ten expeditions he is one of the foremost experts on the Galapagos. He has been featured in various different television documentaries as well as working with filmmakers and other documentary programs off screen. The generic name of the blenny Mccoskerichthys sandae honours McCosker, because he discovered it and assisted in the collection of the type while its specific name honours his then wife, Sandra.